Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5de18f2cbffc31de281a667a95c2d14640a1ee60f4b021bbcedb037f387d9d83' 
  AND token = 'I9+sfNP2rCnURo7+JCPN2whA7Bcf5jyvdXeFr2aBniA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}